SU1718720A3 - Method of producing ferromagnetic chromium dioxide - Google Patents
Method of producing ferromagnetic chromium dioxide Download PDFInfo
- Publication number
- SU1718720A3 SU1718720A3 SU853942402A SU3942402A SU1718720A3 SU 1718720 A3 SU1718720 A3 SU 1718720A3 SU 853942402 A SU853942402 A SU 853942402A SU 3942402 A SU3942402 A SU 3942402A SU 1718720 A3 SU1718720 A3 SU 1718720A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- chromium dioxide
- antimony
- antimony compound
- amount
- water
- Prior art date
Links
- 229940090961 chromium dioxide Drugs 0.000 title claims abstract description 11
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 title claims abstract description 11
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 6
- 230000005294 ferromagnetic effect Effects 0.000 title claims abstract 3
- 150000003839 salts Chemical class 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 150000001463 antimony compounds Chemical class 0.000 claims abstract 4
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 claims abstract 2
- 230000005291 magnetic effect Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910052787 antimony Inorganic materials 0.000 claims description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052785 arsenic Inorganic materials 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims 1
- 235000013980 iron oxide Nutrition 0.000 claims 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 claims 1
- 239000002245 particle Substances 0.000 claims 1
- 150000003892 tartrate salts Chemical class 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 2
- 150000001450 anions Chemical class 0.000 abstract 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 abstract 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 abstract 1
- 239000003607 modifier Substances 0.000 abstract 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- WKCACRNTKAJCRN-UHFFFAOYSA-N antimony;2,3-dihydroxybutanedioic acid Chemical compound [Sb].OC(=O)C(O)C(O)C(O)=O WKCACRNTKAJCRN-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/02—Oxides or hydrates thereof
- C01G37/027—Chromium dioxide
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
- G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
- G11B5/70636—CrO2
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/10—Particle morphology extending in one dimension, e.g. needle-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/80—Particles consisting of a mixture of two or more inorganic phases
- C01P2004/82—Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/11—Powder tap density
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/42—Magnetic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Compounds Of Iron (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Ferromagnetic chromium dioxide is prepared by converting oxides of trivalent and hexavalent chromium under superatmospheric pressure and at elevated temperatures in the presence of water and with the addition of an antimony compound as a modifier and, if required, further additives in an amount of not more than 15% by weight, by a method in which the antimony compound is present in the form of a water-soluble salt whose anion contains one or more organic molecular moieties which are oxidized in concentrated chromic acid.
Description
Изобретение относитс к технологии:/ получени двуокиси хрома, используемой дл изготовлени магнитных, носителей информации .This invention relates to a technology: / for producing chromium dioxide used for the manufacture of magnetic, information carriers.
Целью изобретени вл етс у учше- ние электроакустических свойств магнитного носител информации - уровн шума и относительного уровн эхо-сигнала.The aim of the invention is to consider the electroacoustic properties of the magnetic information carrier — the noise level and the relative level of the echo signal.
П р и м е р. В реакционный сосуд объемом 4л наливают 2,19 л воды. Затем при перемешивании добавл ют 5,68 кг ангидрида хромовой кислоты. Через 10 Мин добавл ют 33 г виннокислой сурьм нокалиевой соли (KSbO (СлНчОб) 0,5 НзО) (0,38 мас.% по отношению к двуокиси хрома) и 104 г учжй- си железа игольчатой формы (1,3 мас.% по отношению к двуокиси хрома. После прекращени выделени газа загружают при перемешивании 2,84 кг окиси хрома (Ш) и перемешивают 20 мин. Реакционную смесь нагревают в автоклаве до 300-350°С. Давление в реакторе поддерживают равным 300- 400 бар. Получают двуокись хрома с влаго- содержанием 1-5 мас.%. Ее удал ют из реактора, суспендируют в водном растворе сульфита натри и подвергают мокрому измельчению . После фильтрации и отмывки ее сушат при 50°С в вакууме. Получают двуокись хрома с удельной поверхностью 34,2 м2/г коэрцитивной силой Не 51,5 кА/м, удельной остаточной магнитной индукцией М у / р 39,3 пТ м /г, и удельным намагничиванием Ms// 68,9 пТ м3/г. На базе двуокиси хрома изготовлены магнитные носители информации и определены следующие магнитные и электроакустические характеристики: коэрцитивна сила Не 52,9 кА/м, остаточное намагничивание Мг 152 кА, максимальное намагничивание Mm 171 кА, регулируемость низких частот Ат 2,5 dB, чувствительность Ет -2,2 dB, регулируемость высоких частот Ан 5dB, чувствитель00PRI me R. 2.19 liters of water are poured into a 4 l reaction vessel. Then, with stirring, 5.68 kg of chromic anhydride is added. After 10 minutes, 33 g of tartaric acid antimony nokali salt (KSbO (SlNoOb) 0.5 HzO) (0.38% by weight relative to chromium dioxide) and 104 g of needle iron form (1.3% by weight with respect to chromium dioxide. After cessation of gas evolution, 2.84 kg of chromium oxide (W) is charged with stirring and stirred for 20 minutes, the reaction mixture is heated in an autoclave to 300-350 ° C. The pressure in the reactor is maintained at 300-400 bar. chromium dioxide with a moisture content of 1-5 wt.%. It is removed from the reactor, suspended in an aqueous solution of sodium sulfite and subjected to wet After filtration and washing, it is dried at 50 ° C in vacuum. Chromium dioxide with a specific surface of 34.2 m2 / g is obtained with a coercive force of He 51.5 kA / m, specific residual magnetic induction M y / p 39.3 pT m / g, and specific magnetization Ms // 68.9 pT m3 / g. Based on chromium dioxide, magnetic information carriers were made and the following magnetic and electroacoustic characteristics were determined: coercive force Not 52.9 kA / m, residual magnetization Mg 152 kA, maximum magnetization Mm 171 kA, low frequency adjustability At 2.5 dB, sensitive St Et -2.2 dB, high frequency controllability An 5dB, sensitivity00
м кэ оm ca o
соwith
ность Ен 3,5 dB, напр жение шумов поко RQo 4$ tfB, отмоситв ьнь й уровень эхо сигжмМ«5$&ав .En 3.5 dB, rest-noise voltage RQo 4 $ tfB, otmositiv ny level echo SigmM "5 $ & amp.
В табл. 1 npeftCTWwew данные по свойствам магнитных носителей информации, изготовленных на ввиоее двуокиси хрома, полученной при рв1лично г количестве добавок , в табл,2 - сравнительные данные по электроакустическим свойствам магнитных носителей информации, полученных по известному и предлагаемому способам. При этом по известному способу в качестве соединени сурьмы ислойьзуш«еокись(Ш) в видасенармонита.In tab. 1 npeftCTWwew data on the properties of magnetic storage media made on your own chromium dioxide, obtained from r number of additives, in the table, 2 - comparative data on the electroacoustic properties of magnetic storage media, obtained by the known and proposed methods. At the same time, according to a known method, as a compound of antimony, isloshush epoxy (III) in the species of armonite.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19853513723 DE3513723A1 (en) | 1985-04-17 | 1985-04-17 | METHOD FOR PRODUCING FERROMAGNETIC CHROMDIOXIDE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1718720A3 true SU1718720A3 (en) | 1992-03-07 |
Family
ID=6268261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU853942402A SU1718720A3 (en) | 1985-04-17 | 1985-08-08 | Method of producing ferromagnetic chromium dioxide |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4670177A (en) |
| EP (1) | EP0198110B1 (en) |
| JP (1) | JPH0744096B2 (en) |
| KR (1) | KR930009766B1 (en) |
| CN (1) | CN1007240B (en) |
| AT (1) | ATE49317T1 (en) |
| CA (1) | CA1269234A (en) |
| DE (2) | DE3513723A1 (en) |
| HK (1) | HK56490A (en) |
| SG (1) | SG39990G (en) |
| SU (1) | SU1718720A3 (en) |
| ZA (1) | ZA855953B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3535465A1 (en) * | 1985-10-04 | 1987-04-09 | Basf Ag | METHOD FOR IMPROVING FERROMAGNETIC CHROME DIOXIDE |
| DE3536116A1 (en) * | 1985-10-10 | 1987-04-16 | Basf Ag | Process for stabilising acicular ferromagnetic chromium dioxide |
| JPH0743824B2 (en) * | 1986-06-04 | 1995-05-15 | 日立マクセル株式会社 | Magnetic recording medium and manufacturing method thereof |
| DE3718299A1 (en) * | 1987-05-30 | 1988-12-15 | Basf Ag | METHOD FOR PRODUCING STABILIZED NEEDLE-SHAPED FERROMAGNETIC CHROMDIOXIDE |
| DE3941578A1 (en) * | 1989-12-16 | 1991-06-20 | Basf Ag | METHOD FOR PRODUCING STABILIZED CHROME DIOXIDE AND MAGNETIC RECORDING CARRIER CONTAINING THIS MATERIAL |
| DE4339841A1 (en) * | 1993-11-23 | 1995-05-24 | Basf Magnetics Gmbh | Finely divided needle-like magnetic chromium di:oxide |
| DE4412611C2 (en) * | 1994-04-13 | 2003-02-27 | Emtec Magnetics Gmbh | Process for the production of finely divided ferromagnetic chromium dioxide |
| DE19714161A1 (en) * | 1997-04-05 | 1998-10-08 | Emtec Magnetics Gmbh | Magnetic record carrier |
| CN102604031B (en) * | 2012-03-13 | 2013-10-30 | 金坛市开瑞源光电科技有限公司 | Preparation method and application of polyester polyurethane elastomer |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3034988A (en) * | 1958-08-22 | 1962-05-15 | Du Pont | Modified chromium oxide ferromagnetic compositions, their preparation and use |
| US3278263A (en) * | 1964-11-27 | 1966-10-11 | Du Pont | Ferromagnetic chromium dioxide and preparation thereof |
| US3449073A (en) * | 1965-12-14 | 1969-06-10 | Du Pont | Process for preparing chromium dioxide and product thereof |
| DE2022820C3 (en) * | 1970-05-11 | 1980-01-03 | Basf Ag, 6700 Ludwigshafen | Process for the production of highly coercive chromium dioxide |
| US3778373A (en) * | 1971-11-08 | 1973-12-11 | Bell & Howell Co | Iron containing ferromagnetic chromium oxide |
| SE389220B (en) * | 1972-06-30 | 1976-10-25 | Montedison Spa | METHOD OF MANUFACTURE OF FERROMAGNETIC CHRONIOXIDE WITH FINE AND HOMOGENEOUS GRANULOMETRY WHICH WAY PROVIDES SELECTED MAGNETIC PROPERTIES |
| DE2942646A1 (en) * | 1979-10-22 | 1981-04-30 | Basf Ag, 6700 Ludwigshafen | METHOD FOR PRODUCING FERROMAGNETIC CHROMDIOXIDE |
| US4524008A (en) * | 1983-12-16 | 1985-06-18 | E. I. Du Pont De Nemours And Company | Controlled initiation chromium dioxide synthesis |
-
1985
- 1985-04-17 DE DE19853513723 patent/DE3513723A1/en not_active Withdrawn
- 1985-07-30 AT AT85109558T patent/ATE49317T1/en not_active IP Right Cessation
- 1985-07-30 DE DE8585109558T patent/DE3575218D1/en not_active Expired - Lifetime
- 1985-07-30 EP EP85109558A patent/EP0198110B1/en not_active Expired - Lifetime
- 1985-08-07 ZA ZA855953A patent/ZA855953B/en unknown
- 1985-08-07 US US06/763,318 patent/US4670177A/en not_active Expired - Lifetime
- 1985-08-08 SU SU853942402A patent/SU1718720A3/en active
- 1985-08-08 CN CN85106854A patent/CN1007240B/en not_active Expired
- 1985-08-08 CA CA000488306A patent/CA1269234A/en not_active Expired - Lifetime
- 1985-08-09 JP JP60174428A patent/JPH0744096B2/en not_active Expired - Fee Related
- 1985-08-09 KR KR1019850005755A patent/KR930009766B1/en not_active Expired - Fee Related
-
1990
- 1990-06-02 SG SG399/90A patent/SG39990G/en unknown
- 1990-07-26 HK HK564/90A patent/HK56490A/en unknown
Non-Patent Citations (1)
| Title |
|---|
| ЕП № 27640, кл. С 01 G 37/027, 1982. * |
Also Published As
| Publication number | Publication date |
|---|---|
| HK56490A (en) | 1990-08-03 |
| JPS61241902A (en) | 1986-10-28 |
| CN1007240B (en) | 1990-03-21 |
| ATE49317T1 (en) | 1990-01-15 |
| EP0198110B1 (en) | 1990-01-03 |
| JPH0744096B2 (en) | 1995-05-15 |
| EP0198110A2 (en) | 1986-10-22 |
| KR930009766B1 (en) | 1993-10-09 |
| DE3513723A1 (en) | 1986-10-23 |
| SG39990G (en) | 1990-08-03 |
| DE3575218D1 (en) | 1990-02-08 |
| US4670177A (en) | 1987-06-02 |
| ZA855953B (en) | 1986-04-30 |
| CA1269234A (en) | 1990-05-22 |
| CN85106854A (en) | 1987-02-25 |
| EP0198110A3 (en) | 1988-07-06 |
| KR860008090A (en) | 1986-11-12 |
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